<!DOCTYPE html>
<html>
<head>
    <title>Demo of ACE Editor</title>
    <!--导入js库-->
    <script src="https://cdn.makalu.cc/js/raphael/2.3.0/raphael.min.js" type="text/javascript" charset="utf-8"></script>
</head>

<body>
<div id="container"></div>
<script>
    var paper = Raphael("container", 500, 300);
    var dot = paper.circle(250, 150, 30).attr({
        fill: "#FFF",
        stroke: "#000",
        "stroke-width": 1
    })
    paper.circle(250,100,100).attr({

    })
</script>

</body>
</html>
